| About this Abstract |
| Meeting |
MS&T22: Materials Science & Technology
|
| Symposium
|
Innovative Process Design and Processing for Advanced Structural Materials
|
| Presentation Title |
K-15: Porous Silicon Carbide (SiC) for Composite Core Sandwich Structures |
| Author(s) |
Dwayne R. Morgan |
| On-Site Speaker (Planned) |
Dwayne R. Morgan |
| Abstract Scope |
Composite core materials enhance performance of composite structures by reducing weight, adding stiffness, and providing impact resistance and energy absorption. Major limitations of common composite core materials like balsa and polymer foams are that they cannot withstand high heat load for use in aerospace hot structure environments. Carbon foams have higher heat resistance but nonetheless are susceptible to significant weight loss when subjected to oxidizing atmosphere above 500 C.
Porous silicon carbide has been developed that has up to 60% porosity and load bearing. The prod-uct is manufactured using net-shape molding techniques and is under consideration as a lightweight high temperature composite core. Silicon carbide is stable at high temperature and routinely used up to 1600 C. The porous silicon carbide is anticipated to provide added stiffness and improved creep resistance for aerospace hot structures. Examples of molded shapes will be presented along with material properties and characteristics. |